Regression
Bruce, You don't tell us what class of data your y is. Assuming y is defined in your enviroment, what does class(y) and str(y) tell you? You'll most likely have to fine-tune your data reading process, or do some post-processing to make sure the y object (and x for that matter) are the classes you want. And as always, PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. You can give us samples of your data with the dput function, see ?dput.
Bruce Kindseth wrote:
I am trying to learn R, and am having problems with doing a simple linear regression. I loaded data from a fixed width file, using wd=c(...), and read.fwf(...) and I can read in the file ok and it comes in as vectors in columns, which is what I expected. The problem is when I try to do a linear regression, lm=(y~x), I get the following error message, "Error in model.frame.default(formula = y ~ x, drop.unused.levels = TRUE) : invalid type (list) for variable 'y' I tried various things, such as wd=numeric(c(..)), unlist(y) and putting x and y in a data frame and attaching it, but nothing helps. I have searched through 3 online manuals, but can't seem to find an answer. Maybe this is so simple that nobody felt the need to address it. Thanks for your help. B.Kindseth [[alternative HTML version deleted]]
______________________________________________ R-help at r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.